Mining-machine



(No Model.)

B. BROMLEY.

MINING MACHINE. No. 269.6

2 Sheets-Sheet 1.v

Patented Dec. 26, 1 882 II o I I N. PETERS. PhoIo-Lilhagnphar. wII-IIIII In". n. c.

I I I I I 1 l I I I I I I I I l I I l I I I I I I I I I I I I I I I I I I '%1 I I I l I I I I I I I I I I l I I I .I I I I I .I I I I I I I I I 19: I

| l|l al all II I] No Model.) 2 SheetsSheet 2,

R. BROMLEY.

MINING MAGHINE. I No. 269,632. Patented Dec. 26, 1882.

W'z'zesses:

A4 mm,

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litres STATES Fries.

PATENT MINING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 269,632, dated December 26, 1882 Application filed June 8, 1882. (No model.)

anachines for cutting coal; and it consists in the peculiar construction and arrangement of parts, whereby a simple, durable, and efficient coal-mining machine is produced, as will be more fully set forth hereinafter.

In the accompanying drawings, Figure l is a sideelevation ofmy machine. Fig. 2 is a top plan view, partly in section. Fig. 3 is a rear elevation, partly in section. Figs. 4; and 5 are detailed views.

A represents a rectangular metallic frame, in which arejonrnaled the parallel hollow shafts B, said shafts being considerably longer than the frame. At the forward end of the frame the shafts are feathered to the sleeves a of the spur-wheels 12, mounted therein, said spurwheels meshing in with one another and serving to rotate "the alternate shafts in an opposite directiorn'as will be readily understood.

The series of spur-wheelsis inclosed in a tight box, A,as shown, so as to retain the lubricant and exclude the dirt.

At'the forward and rear ends of the shafts B are journals in the transverse bars or heads 0 and i said bars having projecting ends, to which wires, ropes, or chains 0 are attached, said wires, ropes, or chains 0 being passed around the drums E, secured to the shaft F, journaled on the top and nearthe forward ends of the frame A. By this construction the alternate shalts are not only adapted to be revolved in opposite directions, but they are capable of being advanced or withdrawn while in operation by means of the drums and ropes, the mechanism for accomplishing this to be described farther on.

To the frontends of the shafts B are attached the cutter-heads G, each of the said cutterheads having the flange g, the groove g, and

the opposite shoulders, 1 projecting fromthe sleeve 1 and provided with holes 9 for the reception and retention of the cutting-tools. (Not shown.) As will be seen in Fig. 2, the alternate cutter-heads are shorter than the others, their flanges g overlapping the flanges g of the 5 others and extending into the grooves g.

Extending through the hollow shafts B are the spiral cleaning rods or conveyors H, which are provided with the pulleys h at their rear ends, around which and the pulleys h, mounted on the rear bar, D, is passed the belt or chain k in such a manner as to cause the alternate cleaning-rods to revolve in opposite directions, not only to each other, but to the shafts B, in which they rotate. To accomplish this the 6 belt is passed over one pulley and under the other throughout the series, the upper half of the belt being stretched straight from the pulley h. Motion is imparted to one or more of the pulleys h, and through the belt to the se' ries of cleaning-rods, by the spur wheel or wheels 703, secured thereto and meshing in with a spur-wheel, I), with which one or more of the shafts B is or are provided, as shown in Fig. By means-of this construction the coal, as it is 7 cut by the cutter, is conveyed rapidly through the revolving shafts B by the reversed rotating cleaning-rods H revolving within them, thus greatly reducing the liahilityof the shafts to. choke with particles of coal or lire-clay, this being a feature of verygreat importance in the practical working of the machine, as will be readily understood.

The construction of the mechanism for advancing and withdrawing the cutting-heads is 8 as follows: Rigidly secured to the shaft F is the pinion f, meshing in with the spur-wheel I, mount-ed upon the frame A. This spur-wheel I is provided with a pinion, i, which is rotated by the rack-bar it, which is a forward exteno sion of the piston-rod K, which reciprocates in a cylinder, L, secured to the rear of the frame A. This cylinder L is provided with the inlet and outlet ports I l, for admitting anddischergor with steam, compressed air, gas, or vapor, as preferred, and is provided with a safetyvalve, 1, admitting of easy adjustment to the pressure required to feed suitably to the material to be out without undue strain upon the I00 machine, thus regulating the penetration of the cutters to the highest speed consistent with safety against breakage, the advantage being that the speed of the feed is adjusted to the hardness of the material to be cut, and not in 105 i a fixed ratio to the revolutions of the cutters,

lug water or oil when used as a hydraulic ram,

as now practiced, this being a great improvement, as will be readily understood.

A means of operating the cutters is shown in dotted lines, Fig. l of the drawings, and in which cylinders are arranged upon the plate A, the connecting-rods of which turn a wormwheel, shaft, and gear-wheel, which meshes with the gear-wheel on one of the cutter-shafts.

Having fully set forth my invention I cl aim- 1. The hollow shafts B, provided with the cutters G, and the cleaning-rods II, the alternate shafts being adapted to be revolved in opposite directions, and the cleaning-rods within them being revolved in opposite directions to the shafts in which they work, in combination with suitable mechanism for operating them,

substantially as shown and described.

2. The hollow shafts B,provided with the rotating heads G, the transverse beads C D, the

shafts being feathered to the spur-wheels b and rotated in opposite directions thereby, in combination with the spiral cleaning-rods '1], adapted to revolve in opposite directions to the shafts in which they rotate, and the mechanism for operating the said cleaning-rods, as set forth.

3. The cylinder L, )rovided with the adjustable safcty-valve l and the piston K, the piston being connected by suitable mechanism to the cutting-shafts B, and adapted to advance and withdraw them, substantially as and for 

